It's been more than a year since his last spill, but Mr. Korby has fallen more than 30 times —he's lost count—in his career, including several serious crashes. He broke his collarbone in one collision with a car, totaled his bike in another. In a third, he was taken unconscious to the hospital. Then there was the delivery truck that pulled in front of him, leaving time only to throw himself from his bike. He hit the side of the van so hard he left a dent. But he got up, grabbed his bike ...